44 
[Vol. VI. 
Journal New York Entomological Society. 
lacosomhre. 
Lacosoma arizonicum, sp. nov. 
$ fore wing slightly incised at anal angle and roundedly produced at vein 3, the 
apex rounded, not falcate ; hind wing rounded, somewhat sharply angled at anal 
angle, and slightly excised between the veins. Body flesh color, shaded with rosy 
pink on head and pectus ; antennae yellowish with long pectinations. Wings pale 
brown, the basal half shaded with rosy pink, sparsely irrorate with brown. An ob¬ 
scure discal dot on both wings, black, overlaid with white, and a narrow, very slightly 
flexuous outer common brown line. Expanse, 29 mm. 
One $. Chiricahua Mts., Arizona (H. G. Hubbard). Type No. 
3789, U. S. Nat. Mus. 
PYROMORPHID^E. 
Acoloithus rectarius, sp. nov. 
Entirely black, the collar concolorous. Fore wings slightly bluish, hind wmgs 
greenish. Expanse, 13 mm. 
One example, Chiricahua Mts., Arizona (H. G. Hubbard). Type 
No. 3788, U. S. Nat. Mus. 
Possibly not distinct from Harrisina mexicana Schaus, which I have 
not seen. 
--- ♦ - 
NOTES AND DESCRIPTIONS OF OSCINID JE. 
By D. W. Coquillett, Washington, D. C. 
The insects comprising this family belong to the group of acalyptrate 
Diptera in which the auxiliary vein is imperfect or wanting, and the 
crossvein, which usually separates the discal from the second basal cell, 
is wanting, as is also the anal cell. The legs are short and rather 
robust. The only other family possessing these characters is the Ephy- 
dridse, but in these the head is usually much broader than high, the 
aristae of the antennae are sometimes long pectinate on the upper side, 
the sides of the face are usually provided with bristles and the oral 
opening is often excessively large, none of which characters occur in 
the Oscinidae. 
In studying up the extensive series of specimens contained in the 
collection of the National Museum several new forms were met with, 
and it was found necessary to make a few corrections and additions to 
the genera given in Osten Sacken’s catalogue. A large series of speci¬ 
mens of Opetiophora straminea , the type species of this genus, collected 
in Texas by Mr. E. A. Schwarz, shows that this genus is a synonym of 
